Easy 7题 Reverse Integer

Question:

Reverse digits of an integer.

Example1: x = 123, return 321
Example2: x = -123, return -321

Solution:

用long处理溢出，注意long和int不能相加~

我的笨办法

public class Solution {
    public int reverse(int x) {
        
        int count=0;
        long tmp=0;
        long sum=0;
        int num=1;
        int cur=x;
        whi